Apache is a free and open-source cross-platform web server software.
Drupal is a free and open-source web content management framework.
jQuery is a JavaScript library which is a free, open-source software designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animation, and Ajax.
Matomo Analytics is a free and open-source web analytics application, that runs on a PHP/MySQL web-server.
Ubuntu is a free and open-source operating system on Linux for the enterprise server, desktop, cloud, and IoT.